In the Transformers franchise, there are numerous Decepticons who have struck fear into the sparks of the Autobots. Among these villains, there's no foe more ferocious than Megatron. The eternal rival of Optimus Prime, the Decepticon Emperor of Destruction is a walking war machine who believes in peace through tyranny.
Source:https://www.cbr.com/transformers-megatron-explained/